var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var index = require('./routes/index');
var users = require('./routes/users');

var config = require('./config.json');

var app = express();


var expressJWT = require('express-jwt');

var secretOrPrivateKey = config.jwt.secretOrPrivateKey //加密token 校验token时要使用
//跨域问题
app.all('*', function(req, res, next) {
	res.header('Access-Control-Allow-Origin', req.headers.origin);
	res.header('Access-Control-Allow-Headers', 'Content-Type, Content-Length, Authorization, Accept, X-Requested-With , yourHeaderFeild');
	res.header('Access-Control-Allow-Methods', 'PUT, POST, GET, DELETE, OPTIONS');
	res.header('Access-Control-Allow-Credentials', true)

	if (req.method == 'OPTIONS') {
		res.send(200);
		/让options请求快速返回/
	} else {
		next();
	}
});

app.use(expressJWT({
	secret: secretOrPrivateKey
}).unless({
	path: ['/'] //除了这个地址，其他的URL都需要验证
}));



app.use(express.static('public'));
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
	extended: false
}));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', index);
app.use('/users', users);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
	var err = new Error('Not Found');
	err.status = 404;
	next(err);
});

// error handler
app.use(function(err, req, res, next) {
	console.log(err)
	if (err.status == 401) {
		res.send({
			code: 401,
			msg: "请选登陆"
		})
	}

	res.locals.message = err.message;
	res.locals.error = req.app.get('env') === 'development' ? err : {};

	// // render the error page
	res.status(err.status || 500);
	res.render('error');
});

module.exports = app;